He began his writing career in Astounding Science Fiction in 1946. From 1946 through 1962 he produced a spate of science fiction stories, mostly published there. One of the earliest, published May 1946, was The Nightmare, later the lead story in A Treasury of Science Fiction, edited by Groff Conklin; it argued for a national policy of decentralizing industry to evade nuclear attacks by terrorists. He also issued the fanzine "Blitherings" in the 1940s.

^Share1163 Hedges, Chris. "The Origin of America’s Intellectual Vacuum" Truth-Out.org November 15, 2010"It wasn’t a cinch I would be in the Communist Party, but in fact I was, starting in 1943 and then resigning soon after on instructions from the party because I was in the military service. This was part of the coexistence of the Communist Party with Roosevelt and the military. It would not disrupt things during the war. When I got out of the Navy I rejoined the Communist Party, but that lapsed in June of 1953. I never got back in touch with them. At the time I was subpoenaed I was technically an ex-Communist, but I did not feel I had left the movement and in some sense I never did."